Thomism
Thomism is the philosophical school that arose as a legacy of the work and thought of Saint Thomas Aquinas, philosopher, theologian, and Doctor of the Church. In philosophy, his commentaries on Aristotle are his most lasting contribution. In theology, his Summa Theologica was one of the most influential documents in medieval theology and continues to be studied today in theology and philosophy classes. In the encyclical Doctoris Angelici Pope Pius X cautioned that the teachings of the Church cannot be understood without the basic philosophical underpinnings of Thomas' major theses:
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